JAC 12th Chemistry Important Questions Chapter 3 (Electrochemistry): झारखण्ड बोर्ड कक्षा 12th सभी विद्यार्थियों के लिए chemistry में chapter 3 Electrochemistry के पिछले वर्षो में जो भी प्रश्न पूछे गए हैं, उनकी चर्चा हम इसमें करेंगे तो इन Important Questions को पढ़ लीजिए.
JAC 12th Chemistry Important Questions Chapter 3: Electrochemistry
झारखंड एकेडमिक काउंसिल (JAC Board) कक्षा JAC 12th Chemistry Important Questions के पिछले वर्षों के सभी महत्वपूर्ण प्रश्न (important Questions) आपको यहाँ पर बताए जा रहे है, जो बोर्ड परीक्षा के लिए बहुत महत्वपूर्ण है. अगर आप इन सभी प्रश्नों को याद कर लेते हो तो अवश्य ही आप JAC Board class 12th Chemistry exam में अच्छे अंक प्राप्त कर सकते हो.
विद्यार्थी इसका उत्तर स्वयं करें। ये सारे प्रश्न आपके परीक्षा (JAC 12th Chemistry Important Questions For Board Exams)में बार – बार पूछे जा रहे है। इसमें आपको सभी chapter का अलग-अलग पिछले 16 से 17 वर्षों के महत्वपूर्ण प्रश्न मिलेंगे। यानि 2006-2022 इसमें आपको ये भी बताया जा रहा है कि कौन से प्रश्न किस तरह से एवं कितने marks के पूछे जा रहें है.
| Name of Organisation | Jharkhand Academic Council Ranchi |
| Category | Important Question |
| Article | JAC 12th Chemistry Important Questions |
| State | Jharkhand |
| Question Types | Previous Year & Important Questions |
| Class | 12th(Inter) |
| Stream | Science |
| Subject | Chemistry |
| Chapter | 3rd Chapter |
| Chapter Name | Electrochemistry |
| Telegram | Join Us |
JAC 12th Chemistry Previous Years Important Questions-
Q1. Aluminium through an electropositive metal, find extensive use as an structural material. Explain. (2006)
Q2. Calculate the quantity of silver deposited cathode when 0.1 ampere electric current is passed for one hour through silver nitrate solution.(Atomic mass of Ag=108) (2006)
Q3. It is possible to reduce MgO at 298 according to the reaction? (2006)
MgO(s)+C(s)→Mg(s)+CO(g)
Q4. Describe Faraday laws of electrolysis. What do you mean by electrochemical equivalent. (2006, 2013, 2016)
Q5. Give the equations to show the relation between equilibrium constant(K) and standard free energy change(∆G°). Name all the term involved in the equation. (2007)
Q6. How does molar conductivity vary concentration of a week electrolyte in solution? Discuss the significance of the Kohlrausch law. (2007)
Q7. State Kohlrausch’s law. Write its two importance. (2008)
Q8. Calculate standard free energy charge for the following reaction at 298K: (2008)
CO(g)+3H2(g)→CH4(g)+H2O(l)
Q9. a.What chemical reaction takes place in a lead Storage battery?
b. Find the molar conductance of 0.2 M H2SO4 if specific conductance of solution is 0.002567 Ohm^-1cm^-1. (2008)
Q10. A solution of Ni(NO3)2 is electrolysed between platinum electrodes using a current 0.5 ampere for 20 minutes what mass of Nickel will be deposited at the cathode? (Ni=58.7amu) (2009)
Q11. The E° value corresponding to the following two reduction reactions are : (2009)
a. Cu+/Cu =0.52 volt.
b. Cu+/Cu+ = 0.16volt.
Q12. Three electrolytic cells A,B and C containing solutions of zinc sulphate, Silver nitrate and copper sulphate respectively are connected in series. A steady Current of 1.5 ampere was passed through them , until 1.45g of silver was deposited at the cathode of the cell B . How long did the current flow? What masses of copper and zinc were deposited in the concerned cells? Atomic mass of Ag = 108 , Cu = 63.5 , Zn = 65.5. (2010)
Q13. Give the equation for the chemical reaction of aqueous NH3 Aur an aqueous solution of copper sulphate.(2010)
Q14. Why does zinc react with dilute H2SO4 but copper does not? (2011)
Q15. State Kohlrausch’s law. Write its two important applications.(2011,2015)
Q16. Explain the following terms : (2011)
a) Cell constant b) Specific conductivity.
Q17. A 0.05 M NaOH solution offered a resistance of 31.6Ω In a conductivity cell. If the cell constant of the conductivity cell is 0.3 67cm-¹ , then determine the molar conductivity of the sodium hydroxide solution at this concentration. (2012)
Q18. Explain the terms : (2012)
a) Specific conductivity b) Equivalent conductivity
Q19. Can we use a copper vessel to store 1(M) AgNO3 solution ? (2012)
Q20. State Faraday’s law of electrolysis.(2013,2016)
Q21. How much copper will be deposited at cathode of an electrolytic cell containing Cu++ ion by the passage of 2 ampere current for 60 minutes? (2013)
Q22. How does molar conductivity change with concentration in the case of (2014,2017)
i) Weak electrolyte ii) Strong electrolytes
Q23. The value of ∆°m of NH4Cl, NaOH abd NaCl at infinite dilution are 129.8 s cm² mol-¹ , 248.1 s cm² mol-¹ and 126.4 cm ² mol-¹ respectively. Find out the value of ∆°m in NH4OH . (2014)
Q24. What do you understand by standard EMF of a cell? Derive relationship between standard EMF of a cell and equilibrium constant. (2015)
Q25. What is the value of electrode potential of Mg2+ / Mg electrode when it is dipped in a solution in which concentration of Mg2+ is 9.91M ? E0 Mg2+ / Mg = -2.36V .
(2015)
Q26. Define molar conductivity of a substance. How does it vary with concentration for weak and strong electrolytes?
(2017)
Q27. What will happen to the value of EMF of the cell Zn | Zn2+ (0.1M) || Cu2+ (0.1M) | Cu , if the concentration of the electrolyte in the anode compartment is increased?(2017)
Q28. What is Salt bridge? Mention its functions. (2018)
Q29. Define conductance and give its unit. (2019)
Q30. Discuss Standard hydrogen electrode. (2020)
Q31. E.M.F. of a cell with Ni & Cu electrode will be (2022)
Given E°(Ni2+/Ni)=-0.25V E°(Cu2+/Cu)=+0.34 V
a. 0.59V
b. 0.09V
c. -0.59V
d. -0.09V
Q32. If 96500C electricity is passed through CuSO4 solution, it will liberate(2022)
a. 63.5g of Cu
b. 31.76g of Cu
c. 127g of Cu
d. 95.25g of Cu
Q33. For a Galvanic cell which one of the following statement is not correct? (2022)
a. Anode is negatively charged
b. Cathode is positively charged
c. reduction takes place at anode
d. reduction takes place at cathode
Q34. The SI unit of molar conductivity is – [2022]
a. S cm²/mol
b. S²/cm
c. cm²/S mol²
d. S/cm²mol²
Q35. Which of the following is not a good conductor? (2022)
a. Cu metal
b. NaCl (aq)
c. NaCl(molten)
d. NaCl(s)
